Under what circumstances is the air compressor failure not handled according to the quality warranty

Abnormal wear of the cylinder bore of the air compressor caused by unclean air intake.

Compressor is one of the important equipment in industrial production, in daily operation, when the compressor gas pipeline, valve encounters failure, how do we check and deal with it? Let's take a look

1. Control the excessive moisture in the pipeline, and maintain and control the pipeline every day;

2. Error in the work of the inlet valve: check the cylinder, valve sleeve and other components, and replace them if necessary;

3. The air intake valve is stuck: check the inlet valve, valve sleeve, or shaft, and replace it if necessary;

4. Broken inlet valve spring: replace the spring;

5. Solenoid valve failure: repair or replace as needed, and check the wiring before replacing;

6. Reciprocating valve damage: repair or replacement.

7. Loose wire joints of solenoid valves: check and tighten the wire terminals;

The inlet valve is generally a normally closed valve to prevent a large amount of gas from entering the head of the banquet chain manuscript during start-up and increase the starting current of the motor. There is an air intake bypass valve on the inlet valve of the screw air compressor, which is used to prevent a high vacuum from forming in the head of the machine when the machine is started and no load, which affects the atomization of the lubricating oil.

At the same time, the air compressor is an important load in industrial production, and the operating characteristics of the traditional air compressor determine that there is a large waste of energy during the operation of the air compressor. How to save energy and reduce energy waste of air compressors in industrial production. Let's use Zhongke Yujie's intelligent air compressor power-saving technology to illustrate:

The intelligent air compressor power-saving system is to greatly reduce the starting current of the compressor by adjusting the soft start, so as to avoid the impact and damage caused by excessive starting current to the equipment when the compressor starts; According to the user's demand for compressed air, the motor power is accurately matched to avoid waste, and the pressure is stable and can also be obtained from the production process of the gas equipment, which is very conducive to the control of the production quality of the enterprise.

Common faults of air compressors: failure of intake filter, failure of compressor speed, wear failure of cylinder, piston, piston ring, failure of poor stuffing box, failure of compressor suction and exhaust valve. The specific repairs are as follows:

1. Failure of the intake filter. Fouling and blockage, so that the exhaust volume is reduced; The suction tube is too long and the diameter of the tube is too small, which increases the suction resistance and affects the air volume, so the filter should be cleaned regularly.

2. The speed of the compressor. The reduced compressor speed reduces the discharge volume. Improper use of air compressor, because the exhaust volume of the air compressor is designed according to a certain altitude, suction temperature and humidity, when it is used on the plateau that exceeds the above standards, the suction pressure is reduced, and the exhaust volume is inevitably reduced.

3. Cylinder, piston and piston ring wear fault. The cylinder, piston and piston ring are seriously worn and out of tolerance, which increases the relevant clearance and increases the leakage, which affects the exhaust volume. When it is a normal grinding, it is necessary to replace the wearing parts in time, such as piston rings.

When the installation is incorrect and the gap is not suitable, it should be corrected according to the drawings.

If there is no drawing, empirical data can be taken, for the gap along the circumference between the piston and the cylinder, such as the cast iron piston, the clearance value is the diameter of the cylinder; For aluminum alloy pistons, the clearance is of the diameter of the air diameter; Steel pistons can take the smaller value of aluminum alloy pistons.

4. The fault of the stuffing letter is not strict. The stuffing box is not strict, and the gas leakage is caused by the production inspection, so that the gas volume is reduced. The reason for this is, first of all, that the stuffing box itself was not manufactured in accordance with the requirements; Secondly, it may be due to the poor alignment between the piston rod and the center of the stuffing box during installation, resulting in wear and strain, resulting in air leakage; Generally, lubricating oil is added to the stuffing box, which plays the role of lubrication, sealing and cooling.

5. Failure of compressor suction and exhaust valves. The effect of the failure of the suction and exhaust valves of the compressor on the discharge volume. Metal fragments or other debris fall into the seat and the valve plate are not tightly closed, resulting in air leakage.

This affects not only the volume of exhaust, but also the changes in interstage pressure and temperature; The air leakage is affected by the poor contact between the valve seat and the valve plate, one is the manufacturing quality problem, such as the warping of the valve plate, etc., and the second is the air leakage due to the serious wear of the valve seat and the valve plate.

1. The suction pressure is too low, which is lower than the lower limit of the low pressure of the pressure relay appliance; (2) The exhaust pressure is too high, and the high-voltage relay is powered off; (3) If the oil pressure is too low, the oil pressure relay will be relayed; (4) The motor is overloaded, and the pure thermal relay is used to act relay;

Summary. 1. Check the components of the pressure loosening valve, clean and replace the failed parts. 2. Disassemble and inspect the cylinder head, check the valve plate, and replace the deformed and broken valve plate. 3. Disassemble and inspect the cylinder head, clean the valve seat plate and valve plate.

Hello dear, the reasons may be: the air pressure gauge is damaged, the pipeline between the compressor and the gas storage and brake control valve is leaking, the intake valve of the control valve is leaking, and the air compressor transmission belt is too loose. I hope my base wheel key can help you, and I wish you a happy life!

There is no air leakage on external inspection.

1. Check the components of the loose pressure punching valve, clean and replace the failed parts. 2. Dismantle and inspect the cylinder head, check the valve plate, and replace the deformed and broken lease judgment and dismantle the valve plate. 3. Disassemble and inspect the cylinder head, clean the valve seat plate and valve plate.

Let's see if there are any of these reasons, dear.

Hello, the main reasons for the failure of the motor of the air compressor are as follows.

1. The air pressure automatically switches when the air pressure is over, and the air pressure continues to rise, and the motor cannot operate normally, which leads to the overload and overload operation of the motor.

2. The sweeping current of the motor exceeds the rated value, causing the temperature of the motor to far exceed the rated temperature, which in turn causes the motor to fail.

3. The motor overload protection fails.

4. The AC contactor cannot meet the requirements of use, resulting in motor failure.

5. The power supply is out of phase and the voltage is abnormal, resulting in the failure of the motor to start normally.

6. The winding is grounded, the motor cannot be started without load, and the fuse of the motor power supply circuit is blown or the switch is tripped.

7. The winding is short-circuited between phases, and the motor cannot start; The fuse of the motor power supply circuit is blown or the switch is tripped; The motor windings are smoking, and there is a burning smell.

8. The winding is short-circuited between turns, the motor is smoking during operation, the local temperature rise is too high, and there is a burning smell.

Shandong Hongrun is happy to answer for you.

1. Insufficient cooling.

Compressors with higher power are generally returned air cooled. The lower the evaporation temperature, the smaller the mass flow of the system tends to be. When the evaporation temperature is very low (more than the manufacturer's specifications), the flow rate is not enough to cool the motor, and the motor will operate at a higher temperature.

Air-cooled compressors (generally not more than 10hp) have little dependence on return air, but have clear requirements for compressor ambient temperature and cooling air volume.

Large refrigerant leaks can also reduce the mass flow of the system and affect the cooling of the motor. For example, the compressor exhaust temperature is too high to protect it.

2. The power supply is out of phase and the voltage is abnormal.

Abnormal voltage and lack of phase can easily destroy any motor. The supply voltage cannot vary more than 10% of the rated voltage. The voltage imbalance between the three phases cannot exceed 5.

High-power motors must be supplied independently to prevent low voltage caused by other high-power equipment in the same line when they are started and running. The motor power cord must be able to carry the rated current of the motor.

If the compressor is running when phase loss occurs, it will continue to operate but with a large load current. The motor windings will overheat very quickly, and the compressor will normally be thermally protected. When the motor winding is cooled to the set temperature, the contactor will be closed, but the compressor will not start, and the locked-rotor will appear, and it will enter the dead cycle of "locked-rotor, thermal protection, and stalled".

In order to prevent the compressor from running out of phase, the three-phase power supply compressor is provided with a phase sequence protector, and the phase sequence protector has two functions, one is to prevent the reverse operation of the compressor from phase sequence error; The second is to prevent the compressor from running out of phase.

3. AC contactor problem.

AC contactor is one of the important components in the motor control circuit, and unreasonable selection can destroy the best compressor. It is extremely important to select the contactor correctly according to the load.

AC contactors must be able to meet demanding conditions such as fast cycling, continuous overload, and low voltage. They must have a large enough area to dissipate the heat generated by the load current, and the contact material must be chosen to prevent soldering in the event of high currents such as actuation or stalled rotors.

4. The compressor lacks oil.

Lack of oil is one of the compressor failures that are easy to identify, when the compressor is short of oil, there is little or no oil in the crankcase, and it is easy to burn out the compressor.

The root cause of oil shortage is not how much oil runs to the compressor and how fast it is, but the poor oil return of the system. Installing an oil separator allows for fast oil return and extended compressor runtime without oil return. The evaporator and return lines must be designed with oil return in mind.

Maintenance measures such as avoiding frequent start-ups, regular defrosting, timely replenishment of refrigerant, and timely replacement of worn piston components can also help with oil return.

Liquid return and refrigerant migration will dilute the lubricating oil and be detrimental to the formation of oil films; The failure of the oil pump and the blockage of the oil circuit will affect the oil supply and oil pressure, resulting in a lack of oil on the friction surface; The high temperature of the friction surface will cause the lubricating oil to decompose, causing the lubricating oil to lose its lubricating ability. Insufficient lubrication caused by these three problems also often leads to compressor damage.